KR20060047438A - A diesel engine with a control system including an electronic module - Google Patents

Abstract

Diesel engines, in particular large diesel engines, have a control system 1 comprising an electronic module 10. Information can be transferred between modules using the intermodule bus system 15. Replacement module 100 may be used to troubleshoot control systems. The intermodule bus system is provided with at least one connection point 150 for the replacement module 100. At this connection point, the attached replacement module is automatically pretreated. In this arrangement, the given operating system is loaded and the operating parameters are activated. In such a system, a pretreated replacement module is inserted and replaced in the intermodule bus system at the connection point of the module.

Diesel engines, control systems, cylinders, replacement modules, surplus systems, pre-treatment

Description

A DIESEL ENGINE WITH A CONTROL SYSTEM INCLUDING AN ELECTRONIC MODULE}

1 is a view showing the central portion of a large diesel engine, in particular a two-stroke diesel engine.

2 is a simplified schematic diagram of a control system for a diesel engine according to the present invention.

The present invention relates to a diesel engine, in particular a large diesel engine with a control system comprising an electronic module according to the preamble of claim 1. The invention also relates to a method for driving a diesel engine according to the invention and to its use. The large diesel engine may be a two-stroke diesel engine as well as a four-stroke diesel engine.

The diesel engine with engine control, disclosed in EP-A-0 989 297, is operated by a control system consisting of an electronic module. In an engine such as a diesel engine, local functions, that is, a function related to a cylinder and a function related to the entire engine, are governed by a control system. In more advanced large diesel engines (Unpublished Patent Application EP0445073.0), the control system comprises a module with a logic circuit designed identically. The cylinders are each associated with one of the control modules, and the logic circuits each include a first functional part and a second functional part. The associated cylinder can be controlled using the first function. The overall function is controlled by a controller distributed throughout the module, in which the overall control of the engine is in each case using a second function but in cooperation with the second function of another module in a redundant manner for at least a portion of the module. It is governed by the overall engine control scheme that can be performed.

If a large diesel engine is used to drive a ship sailing in the ocean, at least part of the engine power should still be available even if individual components of the control system or components of the engine fail. In addition, overall control of the engine must maintain function to an appropriate degree. During this failure, the individual cylinders can be stopped because the engine is forced to run with reduced power. Uninterrupted operation of the engine is achieved by redundant control and the provision of redundant mechanical parts by multiple installation of individual components. In addition to the main control device for actively manipulating the overall control of the engine, the same, second control device which is operated passively in cooperation with respect to the overall engine control can be switched to the active control state without delay if necessary. Due to the redundant scheme, at least part of the engine power is maintained even in the event of a failure. Only one electronic module is provided per cylinder for local control. For the overall functionality with electronic system components, the control system needs to have at least two identical system components.

Despite the provision of the surplus parts, it is necessary to store the replacement module so that the surplus parts can be provided in case the module fails again.

It is an object of the present invention to provide an embodiment for a diesel engine in which the stored replacement module can be taken out and inserted and the storage of the replacement module can be carried out in a preferred manner. This object is met by the engine defined in claim 1.

Diesel engines, in particular large diesel engines, have a control system comprising an electronic module. Information can be transferred between modules using an intermodular bus system. Replacement modules can be used to troubleshoot control systems. The intermodule bus system is provided with at least one connection point for the replacement module. The attached replacement module is automatically pretreated by the control system. In this arrangement, the given operating system is loaded and the operating parameters are activated. The replacement module can be passively operated in standby mode in addition to the active control system. If an active module fails, the replacement module becomes immediately available for replacement of the failed module. The pretreated replacement module is inserted and replaced in the intermodule bus system at the module's connection point.

The dependent claims 2 to 6 relate to a preferred embodiment of the diesel engine according to the invention. Claims 7 and 8 relate to a method of operating an engine according to the invention and claim 9 relates to the use of the engine.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The diesel engine, partly a two-stroke diesel engine, shown in part in FIG. 1 comprises a plurality of cylinders, in which the local function for the cylinder 2 and the comprehensive function for the entire engine are controlled.

In addition to the control system 1, in the example of the engine shown in FIG.

A gas exchange system 20 having a gas exchange valve 21, a valve member 211, and a passage 212 through which air is supplied and combustion gas can be discharged;

Liquid fuel 300 which can be injected into the combustion chamber 23 between the valve member 211 and the piston 24 by the controlled injection member 32 and the injector 22 (nozzle tips 22a and 22b). Injection system 30 for supplying a volume control method or a time control method;

Respective pumps 31 and 41 for supplying a fuel 300 and / or a control medium 400 which can be moved into the gas exchange valve 21 through the controlled supply member 42; And

An accumulator 43 for the control medium 400 and an accumulator 33 for the fuel 300, so-called "common rail";

These accumulators 33, 43 are connected on the one hand to the respective pumps 31, 41 and on the other hand to the respective injection system 30 and the gas exchange system 20 of all the cylinders 2. .

The pumps 31, 41 and the injection member 32 and the supply member 42 are connected to the control system via signal transmission lines 310, 410, 320 and 420. An additional connection line 210 is connected to the sensor of the gas exchange valve 21.

Although not shown, additional parts of the engine

A hydraulic system having a member for performing injection and gas exchange; And

The rotation of the shaft driven by the engine makes it possible to determine the angle for synchronization of local and comprehensive functions, and to control fuel supply and gas exchange and to control the starting air supply.

2 shows in detail a preferred control system 1 of a diesel engine according to the invention. The control system 1 comprises, as illustrated, the control module 10, specifically the modules 10a, 10b, 10c, 10d, 10e, 10f, all of which are provided with two bus systems (redundant) for redundancy. It is connected with the intermodule bus system 15 which consists of 15a, 15b. Information can be transferred between modules 10 including replacement modules 100 connected using an intermodule bus system 15. Another part of the control system 1 is a block 7 relating to the first part of the comprehensive function (for example an alarm system of the ship, a safety system, control of the rotational speed), and an actuator relating to another part of the comprehensive function. 8a, 8b, 8c, 9a, 9b). Block 7 is controlled in a redundant manner, ie by operating two modules 10a, 10b simultaneously via two bus systems 17a, 17b. Even if one of these modules 10a, 10b fails, block 7 continues to receive the information necessary for control.

It may be desirable if two or more replacement modules 110 are connected to the inter-module bus system 15. Experience has shown that an electronic module is stored in an unfavorable environment (condensate due to moisture, temperature change) in a reservoir, which operates in standby mode (i.e. voltage is applied to the module but no load is applied). Longer life than the replacement module. The replacement module 100 connected to the intermodule bus system 15 is also preferably monitored for its availability by the control system.

The replacement module 100, which is connected to all modules 10 and likewise the inter-module bus system 15, is provided with the same operating program which is preferably designed for the diesel engine to be controlled. The module and replacement module 100 also accept only the same set of values for the operating parameters, although generally only some of the operating parameters are available in view of the operability of the individual modules. The integration of the module 10 in the control system 1 is achieved by means of a connection cable with a plug connector, for example, and it is achieved by these connections that the individual modules 10 have a function. The functioning of the individual modules 10 is confirmed and activated by plugging in a plug at the connection point.

The individual modules 10 are arranged and connected to the control system 1 such that only a release step is carried out in order to replace the defective module 10. When the individual modules 10 are removed, the control system 1 is maintained in a redundant manner as briefly described at the beginning of the present specification (ie in the form of two functional units of logic circuits in each case, The associated cylinder is governed by the first functional part and the generic function is governed by the second functional part).

For each module 10 an exchange with the replacement module 100 can be carried out. At least one connection point 150 is provided for the replacement module 100 to be provided to the intermodule bus system. After one replacement module 100 obtained from the storage is mounted, it is automatically pretreated by the control system. An operating program written for the diesel engine to be controlled is loaded or activated and specific values are associated with the operating parameters. The connected replacement module 100 cooperates in the standby mode in addition to the actively operating control system 1. If the active module 10 fails, the replacement module 100 is ready for immediate use and the replacement module pretreated in the intermodule bus system 15 at the connection point 150 of the module 10 to be replaced. This is a new insert.

Pretreatment of the replacement module 100 requires a significantly longer time than that required for module replacement. Therefore, in the diesel engine having the replacement module 100 pretreated according to the present invention, after replacing the module in the inter-module bus system 15, the operating system and the operating parameters must be executed first in the replacement module 100. This saves time compared to the engine.

The replacement module 100 mounted in the inter-module bus system 15 of FIG. 2 forms a connection point as a "gateway" which is connected to a part of the peripheral device 5, and the peripheral device 5 is a transducer ( 105 and an operating panel 6, the exchange of information between the operating panel 6 and the control system 1 can be performed. A "gateway" is a system component that protects an inter-module bus system 15 from external disturbing electrical influences from a damaging environment. The "gateway" allows only the signals necessary for the exchange of information to be passed.

Generally, a plurality of replacement modules 100 are stored. When the replacement module 100 is exchanged at the connection point 150 arranged in the inter-module bus system 15, it is preferable to perform pretreatment and to store the pretreated replacement module 100. These replacement modules 100 can be used immediately and treated before being used, ie the operating program is loaded and the operating parameters are activated, suitable for the direct replacement of the failed module 10.

The control system 1 of a diesel engine according to the invention is provided for use in an ocean nautical vessel, in particular with an engine for rotating the drive shaft of the vessel. For this purpose the control module 10 has an input and an output, through which it is possible to exchange information concerning the electronic control of the ship's alarm system, the safety system and the rotational speed of the ship's drive shaft. Information can be used to further influence.

Actuators 8a, 8b, 8c, 9a, 9b are present in surplus number. These are attached to modules 10c, 10d, 10e via bus systems 18a, 18b, 18c. Even if one of the actuators fails, the intact actuator is appropriately operated by the corresponding module 10. Actuators 8a, 8b, 8c are three pumps for servo oil, and actuators 9a, 9b are pumps for fuel 300 to be supplied to accumulator 33, for example. For example, if actuator 8a fails, proper operation of intact actuators 8b and 8c is achieved using corresponding modules 10d and 10e of control system 1. In such a device, the demand for servo oil can be covered by increasing the pumping amount of these two intact actuators 8b, 8c using two of the three actuators. If one of the modules 10c, 10d, 10e associated with the actuators 8a, 8b, 8c fails, the corresponding actuators 8a, 8b, 8c cease to operate, but at these actuators 8a, 8b, 8c. There is no margin of failure for the entire engine.

According to the present invention, a diesel engine is provided in which a stored replacement module can be withdrawn and inserted and storage of the replacement module can be performed in a preferred manner.

Claims (9)

Has a control system comprising an electronic module 10, information can be transferred between the modules using an intermodular bus system 15, and is alternative for solving the failure of the control system. In diesel engines in which module 100 may be used, The inter-module bus system is provided with at least one connection point 150 for the replacement module 100, and the replacement module attached to the connection point is loaded by the control system by loading a predetermined operation program to activate operation parameters. Pre-treatment can be done automatically, The replacement module may be passively operated in the standby mode in addition to the actively operated control system, In case of an active module failure, the pretreated replacement module is inserted into the inter-module bus system at the connection point of the module to be replaced so that the replacement module becomes immediately available for replacement of the failed module. Diesel engine. The method of claim 1, It further comprises a plurality of cylinders 2, Local functions for the cylinder and comprehensive functions for the whole diesel engine can be achieved by the control system, Each cylinder is associated with one module 10 of the control system, Each of the control module 10 includes a logic circuit having the same design with a first functional unit and a second functional unit, The associated cylinder may be controlled by the first functional unit, The comprehensive functions are surplus in such a way that, by the control unit distributed throughout the module, the comprehensive engine control is in each case redundant in cooperation with the second functional part of another module for the at least part of the module. Can be made so that in case of a disturbance at least part of the engine power can be maintained by the surplus manner Diesel engine, characterized in that. The method according to claim 1 or 2, Said local function and said comprehensive function can be performed by simultaneous operation of said module (10) using the same operating program. The method according to any one of claims 1 to 3, The replacement module 100 connected to the inter-module bus system 15 forms a connection point 15 as a “gateway” to the peripheral device 5, through which the control system 1 Diesel engine, characterized in that the exchange of information with. The method according to any one of claims 1 to 4, The individual module 10 is arranged and connected to the control system 1 such that only a local disassembly step is performed on the module to replace the failed module, even if the individual module fails. A diesel engine characterized by still being able to operate. The method according to any one of claims 1 to 5, The module 10 of the control system comprises the following components of the engine, Injection system 30 for the associated cylinder 2 for supplying liquid fuel 300: A gas exchange system 20 for the associated cylinder 2, Pumps 31, 41 for supplying the fuel and control medium 400, An accumulator 43 for a control medium and an accumulator 33 for fuel, called a "common rail", connected to said pump, said injection system and said gas exchange system, A hydraulic system having a member for performing said injection and said gas exchange, An angle measuring member for synchronizing local and comprehensive functions by rotation of a shaft driven by the engine, and A device for regulating the fuel supply and gas exchange and for controlling the starting air supply Diesel engine, characterized in that connected to each of the signal transmission line (100). In the method of operating a diesel engine according to any one of claims 1 to 6, In order to store the pre-treated replacement module, a plurality of replacement modules 100 are stored, and the replacement module is exchanged at the connection point 150 for the replacement module of the inter-module bus system 15. How it works. The method of claim 7, wherein Operating capability of the replacement module (100) connected to said intermodule bus system is monitored by a control system. In the use of the engine which uses the engine of any one of Claims 1-6 as an engine which rotates the drive shaft of the ship which sails the ocean, The control module 10 has a signal input, mainly from the electronic rotational speed control of the ship's alarm system 5, the safety system, and the drive shaft of the ship, which affect the control system 1. Use of an engine characterized by being able to input information.

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